By briefly slipping between Earth and sister Jovian moon Io, Europa fortuitously enabled an Earth-based telescope to observe, with greater detail than ever before, a huge, puzzling volcano on Io.
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Scientists Find "Close Cousin" of Earth
The Kepler space telescope spots a planet in a solar system 1400 light years away that closely resembles Earth in its size, distance from its star, and the type of star it orbits.
Posted inFeatures
Hubble's Legacy: The Pillars of Creation
The Pillars of Creation remains to this day Hubble's most iconic view of the cosmos.